Tenma 72-10465 User manual

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LCR Multimeter with USB
Model No. 72-10465

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When using electrical appliances, basic safety precautions should always
be followed to reduce the risk of re, electric shock and injury to persons or
property.
Read all instructions before using the appliance and retain for future reference.
• Check the product before use for any damage. Should you notice any damage on
the test leads or casing, do not use.
• This product contains no user-serviceable parts. All repairs should only be carried
out by a qualied engineer. Improper repairs may place the user at risk of harm.
• Do not apply any input voltage to the meter.
• Turn off power and discharge any capacitors before connecting the meter to circuits
or components to be tested.
• Do not make adjustments to the setting while connected to the circuit under test.
• Children should be supervised to ensure that they do not play with the product.
• Do not use the product for any purpose other than that for which it is designed.
• Do not operate the product around explosive gas, vapour, or dust.
• Do not operate or store in an environment of high humidity or where moisture may
enter the product as this can reduce insulation and lead to electric shock.
• Turn the meter off when not in use to save the battery.
• Remove the battery if the meter is not to be used for long periods.
• Replace the battery as soon as the low battery warning appears on the display.
PRODUCT OVERVIEW
Main Features
• The meter is a 19,999 digit display, plus secondary display of 1,999.
• Measurement frequency 100Hz/120Hz/1kHz/10kHz/100kHz.
• Measurement voltage 0.6Vrms.
• Output impedance 120Ω
• Measurement of DCR DC resistance.
• Calibration compensation of open circuit/short circuit
• Automatic shutdown after 5 minutes of inactivity.
• Relative mode and tolerance sorting.
• USB power communication with PC for data acquisition and analysis.
WHAT’S INCLUDED
• LCR meter with battery.
• Instruction manual.
• SMD test clamp.
• USB interface lead.
• PC software CD.
• Multi-purpose socket.
• Short circuit splice.
ELECTRICAL SYMBOLS GUIDE
Low battery Relative PC Communication
Resistor Diode Capacitance

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CONTROLS AND CONNECTIONS
1. LCD Display
2. Calibration of open/short circuit
3. Auto power off
4. Relative measurement
5. Main readout display
6. Auxiliary readout
7. Analogue bar graph
8. Sieving tolerance mode
9. Data Hold mode
1. LCD Display
2. Frequency key/sort button
3. Calibration button
4. Power button
5. USB function button
6. Auxiliary function parameter
button
7. Relative measurement button
8. Input connection
9. Shield ground terminals
10. Series/parallel button
11. Function button for inductance,
capacitance or resistance
12. Hold/Enter button
13. Backlight/Setup button
FUNCTIONS
Automatic measurement
• Default status is set to automatic identication mode (AUTO LCR) on powering up.
• Default frequency is 1K - the meter will identify impedance characteristics
automatically. It will also select the main parameter L,C or R and either serial or
parallel modes.
Data Retention
• Press HOLD during measurement to lock the current displayed gure. Press HOLD
again to return to normal measurement.
Manual L/C/R mode selection
• Press “FUNC” key repeatedly to select parameters of “AUTO, LCR-+AUTO, L-+
AUTO, C-+AUTO, R-+DCR-+AUTO LCR”
• Press SERIES/PAR button to switch between series and parallel modes.
• Press D/Q/Θ to select auxiliary parameters of D, Q or ESR.
Note: Select serial mode for ESR and parallel for RP modes. In AUTO mode these
auxiliary parameters can be ignored as they are automatically set.

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Measurement Frequency
• The meter can provide 5 frequency testing points, namely, 100Hz/120Hz/1kHz/
10kHz/100kHz. On powering on the default frequency is 1K.
• Press FREQ button to select different frequency points for measurement.
Note: DC impedance is measured under AUTO OCR mode and measurement
frequency is automatically set.
Calibration function
• This can be used to reduce interference of distribution parameters introduced by
the test leads. Calibration includes both short and open circuit.
• Short circuit calibration reduces the inuence of the test leads and contact
resistance when measuring low impedance elements.
• Open circuit calibration reduces the inuence of the capacitance and distributed
resistance when testing high impedance elements.
• Press and hold CAL button to enter open circuit calibration and the display shows
OPEN. Press CAL again and the screen shows a countdown from 30 to 0 after
which it displays PASS.
Sorting Measurement
• Sorting mode is used to quickly sort elements of which the main parameter is within
a certain scope.
• The sorting range can be set to ±0.25%, ±0.5%, ±1%, ±2%, ±5%, ±10%, ±20%, and
+80%~-20%. Default is set to ±1%.
• Press SETUP button, RANGE displays on the LCD.
• Press ENTER to conrm then use ▼ or ▲ to decrease or increase the sort value or
press ► or ◄ for to adjust the value of the main parameter.
• Press ENTER to conrm the sieving mode value settings.
• Press FUNC button to select required mode AUTO L, AUTO C, AUTO R or AUTO
DCR.
• Connect the test leads have been connected to the measured element and press
FREQ to enter sieving mode.
• The main display will show PASS and the auxiliary display shows the main value of
measured elements if within the typed nominal value and the buzzer sounds.
• The main display will show FAIL and the auxiliary display shows the main value of
measured elements if outside the typed nominal value.
Deviation ratio measurement
• Deviation measurement is used to compare with deviation the ratio of 2 elements.
• The main LCD display can be typed in automatically as the nominal value.
• Percentage display scope: -99.9%~99.9%.
• Display percentage: REL%=(DCUR DREF) / DREF x 100%.
• DCUR: Main parameter of measured elements.
• DREF: Typed nominal value.
• Auxiliary display is OL% and the main display is the main parameter of measured
elements if DCUR >DREF or 2DCUR < DREF .
• To select deviation measurement press FUNC button to select required mode
AUTO L, AUTO C, AUTO R or AUTO DCR.
• Connect the test leads have been connected to the measured element and press
REL to enter deviation proportion measurement mode. displays on the LCD.
• The main display will show the main parameter of the measured element and the
auxiliary display shows the deviation as a percentage.
• Press and hold REL button to exit deviation measurement.

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PC Communication mode
• Press PC button to enter USB connection mode. The symbol is displayed on the
LCD.
• Connect the USB lead between the meter and the computer and run the software
program on the computer to start data transmission.
• Press PC button again to end transmission and disconnect the USB lead.
Note: Installation and operation guide for the PC interface are on the CD-ROM included.
Backlight
• Press and hold the LIGHT button to switch on the LCD back light. This function will
automatically cease after 60 seconds.
• Press CAL again and SRI is displayed in the auxiliary display.
• Insert a short circuit splice into the testing terminals and then press CAL again to
begin calibration.
• A countdown from 30 to 0 starts then PR55 is displayed when short circuit
calibration is complete.
• If the display shows FRIL the calibration has failed. Check that the short circuit
splice is not tted while performing an open circuit calibration and that it is
connected correctly for a short circuit calibration.
• Press CAL again to exit and return to measurement mode.
• Remove the splice before continuing.
PC Communication Protocol
• Start PC communication function to connect instrument and computer by USB wire
for data acquisition. Communication parameters:
Bit rate: 9600
Data bit: 8
Start bit: 1
Stop bit: 1
Inspection: Without